Electrical Engineering

Total capacitance for parallel capacitors is simply the sum of all capacitor's individual capacitances. This would apply within (reasonably) any frequency, ignoring non-ideal resistance and inductance, so the same can be said for capacitive reactance.

Advantages:-

1- mosfet are small compare to bjt's so it fabricated easily and space saving scheme on the ic's

2- mosfet's input impedance are very high so they do not load the circuits. loading effect doesn't arise.

3- operating frequency is very high so may be used at higher frequencies.

4- used in digital circuits for it's reliability.

5- effect of noise is less than bjt. so high signal to noise ratio.

6-mosfets are unipolar devices so reverse saturation current doesn't exist.

7- it consume less D.C power rather than BJT.

Disadvantages:-

handling is not easy-

Mosfet is very sensitive to electrostatic charge so it may be destroy when you touch the pins of a mosfet devices by hand.

trans conductance is low than BJT.

A capacitor in its simplest form is merely two electrically conductive plates separated by an insulator from each other. As such the capacitor will block any DC voltage from passing through it, up to the electrical dielectric strength of the insulator. The capacitor will accept a DC charge and an electrical field will exist between the plates of the capacitor. The capacitor will retain this charge until it either leaks away via the high electrical resistance of the insulator, or is intentionally discharged.

When an AC or varying voltage is applied to a capacitor, a varying electrical field is set up between the plates of the capacitor. This will thus pass through the capacitor, and can be seen on the opposite plate. Thus, a capacitor will pass an AC voltage.

Now,as to the question, " application of Capacitor". One of the oldest and most useful of capacitor applications is filtering or smoothing the output of an AC to DC power supply. In this supply, an AC voltage is rectified by a diode into a varying DC voltage. A capacitor is placed across the output, and serves to supply voltage or "fill in" the output whenever the output voltage is less than the capacitor. The capacitor subsequently recharges on the next cycle and repeats the process. Thus, the output voltage of the power supply is smoothed out.

If you take a permanent magnet and heat it up past the Curie temperature (or Curie point, Tc) and cool it, the magnetic domains in the magnet, which were aligned when it was made, will become randomly oriented. When the "magnet" cools, its magnetic properties will have "disappeared" and the you'll have a piece of metal alloy. If you like, you can make a new magnet out of your hunk of metal by heating the metal past the Curie point again, applying a static magnetic field to it, and then cooling it back down in the presence of the magnetic field. That's the way the magnet was manufactured and made into a magnet to begin with.

Anything that a voltmeter is measuring has some internal output impedance. If the voltmeter had a low input impedance, these two impedances would form a voltage divider and reduce the voltage measured.

The voltmeter has a high input impedance so that it does not affect ("load down") the thing it is measuring.

BJT & FET parameters are temperature dependent. In BJT the collector junction resistance decreasing ( collector current increasing) with temperature raise.Due to the highe temperature & current transistor will damage quickly. In FET drain resistance increasing (drain current decreasing ) with increasing temperature.Due to this property it will not damage easily. We can say from the above two statements FET is more temperature stable.FET can use in highe temperature applications.

The electric path which starts from the positive terminal of a cell or battery ends at its negative terminal, without any break, is called closed electric circuit or complete electric circuit. The electric path,which starts from the positive terminal of a cell or battery, is broken at some point, is called open electric circuit or incomplete electric circuit.

Diamond, rubber, plastic, styrofoam, ice, wood, glass, paper, concrete.

A: It must be be understood that current needs voltage other wise it is zero. An ammeter for DC is always a voltmeter that reads small IR drop to convert that reading into current present. Like an ohmmeter needs volts to read ohm. Both reading are volts it just convert those reading into whatever scale is switch to.

Zener diodes operate like any other diode in reverse bias, they just have the point where they breakdown more carefully controlled, and usually lower than the typical ~50V for a standard silicon diode. The process by which most diodes (with breakdowns larger than a few volts) operate under reverse biases strong enough to cause breakdown is called "Avalanching".

Avalanching is where the reverse biasing is strong enough that the electric field between the positive and negative terminals grows to a point where the electrons and holes being swept across the junction have enough energy so that when they eventually release that energy it is enough to generate a new electron and hole pair which themselves are swept away by the electric field also.

While a parallel conversion minimizes the risk of major flaws in the new system causing irreparable harm to the business; it also means the cost of running two systems over the period must be incurred. Because running two editions of the same system on the computer could place an unreasonable demand on computing resources, this may be possible only if the old system is largely manual

Typically in the US, voltage is +/- 110-120 volts AC RMS (so you can get 240 total), and a typical service will be 100 Amps (I believe, but I could be wrong on "typical" here). This doesn't mean the home uses 100Amps, it means this is the peak amount the home is allowed to draw.

A: ACTUALLY they are both the same just the application makes one or the other. Their function is to measure potential difference on a load or circuitry

You have to reduce the voltage by a factor 50/60 to avoid saturation in the active iron of the motor. Accordingly the available max load of the motor is reduced by (50/60)^2. Nevertheless the actual load of the motor is defind by the requirements of the driven machine (pump, elevator, etc). The nominal speed of the motor is reducet too.

This depends on the application. It may be OK to do so, or it may result in problems. If this is an already designed circuit, and you have a 820u cap that has blown, I suggest replacing with a 1000u (in my experience, this is more common and readily available), AND i usually up the voltage rating on the cap.

Capacitors typically blow due to overvoltaging or reverse polarizing them. If they've blown before, it's likely you'll have similar problems again, which is why i go with bigger, and higher voltage rated. I hate reduing things repeatedly.

It gets hooked up like a switch would be. The main power wire goes to the positive side on the cap and a short power wire comes off of the positive side of the cap to go to the amp. Ground comes from car metal to the negative side of the cap and a short ground comes off of that negative to go to the negative on the amp.

A series circuit allows only one path for the electron path to follow. This type of circuit is found in something like Christmas tree lights. But a parallel circuit allows the 2 or more path for the electron path to follow. This is primarily used in households. So no, they are not the same electrons because they are two completely different circuits.